You need to go to the system administrator responsibility. There you have Concurrent-->Program-->Define Form. You can query for any concurrent program and click on the parameters tab to see the parameter list and their default values. The underlying tables/views can be seen from the record history.

DESCRIPTIVE_FLEXFIELD_NAME is key to identify the parameters of its corresponding concurrent program.

1. SELECT CONCURRENT_PROGRAM_NAME FROM FND_CONCURRENT_PROGRAMS
- It gives your concurrent program name
2. SELECT * FROM FND_DESCR_FLEX_COLUMN_USAGES WHERE DESCRIPTIVE_FLEXFIELD_NAME LIKE '%<CONCURRENT_PROGRAM_NAME>%'
- Substitute the concurrent program name in the above 2nd query